[Fedora-livecd-list] RFC- multiple configs support

[Douglas McClendon]

I'm putting together a feature enhancement patch for livecd-tools, that 
will basically just allow multiple instances of --config on the command 
line, and then build something that is the same as if one --config 
option was used on a kickstart file that is the appended contents of the 
multiple specified kickstarts.

This came about because I was considering the biggest differences 
between the VirOS livecd generation tool I'm working on for myself, and 
livecd-creator.  non-root was the top thing, but the 2nd biggest thing 
was just my whole dna/virus/gene/trait metaphor.  I.e. building livecds 
with a mix and match collection of traits, from a library of preexisting 
stuff.

And then I realized that just implementing the above, brings that type 
of methodology to livecd-creator.  Yes, of course you can do this 
manually with cat appending or kickstart including.  But I think the 
implementation is so simple, and the functionality useful enough, that 
its worth doing.

The next thing after that, which would be a bit tougher, is the idea of 
passing variables to the kickstart files.  Maybe already the post 
scripts can pull in environment variables (haven't tried it), but I 
think it'd be better if you could specify some variables/define-macros 
on the command-line, and more or less have them sed-replaced in the 
kickstart.

To give an idea of kind of where I'm aiming, something like this-

livecd-creator \
     --config=fedora-livecd-desktop.ks \
     --config=emacs-and-friends.ks \
     --config=add_user_in_liveinit.ks \
     --define=LIVEUSER=guest

The result would be that instead of the current user that gets 
autologged in being named 'fedora', it would be named 'guest'.

Anyway, the define bit may be tricky, but I'll try to get together a 
simple patch for the multiple kickstarts in the next couple days.

As the subject line says-  comments requested.

-dmc